title: PCBs in transformer oils.
mesh_terms: D005648:Fuel Oils / Q000032:analysis*; D010578:Petroleum / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000032:analysis*
chemical_list: D005648:Fuel Oils; D010578:Petroleum; D011078:Polychlorinated Biphenyls